From 8324b947487f72fd8cfc439ea5ae5bd1187fff1b Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Wed, 6 May 2009 17:39:30 +0200
Subject: Exception und ThreadHandler nach Net verschoben

---
 src/Net/ThreadManager.cpp | 215 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 215 insertions(+)
 create mode 100644 src/Net/ThreadManager.cpp

(limited to 'src/Net/ThreadManager.cpp')

diff --git a/src/Net/ThreadManager.cpp b/src/Net/ThreadManager.cpp
new file mode 100644
index 0000000..9eb965d
--- /dev/null
+++ b/src/Net/ThreadManager.cpp
@@ -0,0 +1,215 @@
+/*
+ * ThreadManager.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ThreadManager.h"
+#include "FdManager.h"
+
+#include <fcntl.h>
+#include <sigc++/bind.h>
+#include <sigc++/hide.h>
+
+#include <ignore-value.h>
+
+namespace Mad {
+namespace Net {
+
+ThreadManager ThreadManager::threadManager;
+
+
+void ThreadManager::workerFunc() {
+  while(true) {
+    gl_lock_lock(runLock);
+
+    if(!running || !isThisWorkerThread()) {
+      gl_lock_unlock(runLock);
+      return;
+    }
+
+    gl_lock_unlock(runLock);
+
+    gl_lock_lock(workLock);
+    while(work.empty()) {
+      gl_cond_wait(workCond, workLock);
+
+      if(!running) {
+        gl_lock_unlock(workLock);
+        return;
+      }
+    }
+
+    sigc::slot<void> nextWork = work.front();
+    work.pop();
+
+    gl_lock_unlock(workLock);
+
+    nextWork();
+  }
+
+  // And let the new worker thread join us...
+  pushWork(sigc::bind(sigc::mem_fun(this, &ThreadManager::threadFinished), (gl_thread_t)gl_thread_self()));
+}
+
+void ThreadManager::detach() {
+  if(!isThisMainThread()) {
+    Common::Logger::log(Common::Logger::CRITICAL, "Tried to detach main thread! This is just WRONG!");
+    return;
+  }
+
+  gl_lock_lock(runLock);
+  bool isRunning = running;
+  gl_lock_unlock(runLock);
+  if(!isRunning) // There's no point in creating a new worker thread when we aren't running anymore
+    return;
+
+  gl_lock_lock(threadLock);
+
+  if(workerThread == (gl_thread_t)gl_thread_self()) {// Already detached?
+    threads.insert(workerThread);
+    workerThread = gl_thread_create(&ThreadManager::workerStart, 0);
+  }
+
+  gl_lock_unlock(threadLock);
+}
+
+void ThreadManager::pushWork(const sigc::slot<void> &newWork) {
+  gl_lock_lock(workLock);
+
+  work.push(newWork);
+
+  gl_cond_signal(workCond);
+  gl_lock_unlock(workLock);
+}
+
+void ThreadManager::pushIO(const sigc::slot<void> &newIO) {
+  gl_lock_lock(ioLock);
+
+  ioQueue.push(newIO);
+
+  if(!hasIO) {
+    hasIO = true;
+    ignore_value(write(ioNotifyPipe[1], "", 1));
+  }
+
+  gl_lock_unlock(ioLock);
+}
+
+void ThreadManager::runIO() {
+  gl_lock_lock(ioLock);
+
+  // Empty the pipe
+  char buf;
+  ignore_value(read(ioNotifyPipe[0], &buf, 1));
+  hasIO = false;
+
+  while(!ioQueue.empty()) {
+    sigc::slot<void> handler = ioQueue.front();
+    ioQueue.pop();
+    gl_lock_unlock(ioLock);
+
+    handler();
+
+    gl_lock_lock(ioLock);
+  }
+
+  gl_lock_unlock(ioLock);
+}
+
+
+void ThreadManager::doInit() {
+  gl_lock_init(threadLock);
+  gl_lock_init(runLock);
+
+  gl_lock_init(workLock);
+  gl_cond_init(workCond);
+
+  gl_lock_init(ioLock);
+  hasIO = false;
+
+  // TODO Error handling
+  pipe(ioNotifyPipe);
+
+  fcntl(ioNotifyPipe[0], F_SETFL, fcntl(ioNotifyPipe[0], F_GETFL) | O_NONBLOCK);
+  fcntl(ioNotifyPipe[1], F_SETFL, fcntl(ioNotifyPipe[1], F_GETFL) | O_NONBLOCK);
+
+  Net::FdManager::get()->registerFd(ioNotifyPipe[0], sigc::hide(sigc::mem_fun(this, &ThreadManager::runIO)), POLLIN);
+
+  running = true;
+
+  gl_lock_lock(threadLock);
+
+  mainThread = (gl_thread_t)gl_thread_self();
+  workerThread = gl_thread_create(&ThreadManager::workerStart, 0);
+  loggerThread = gl_thread_create(&ThreadManager::loggerStart, 0);
+
+  gl_lock_unlock(threadLock);
+}
+
+void ThreadManager::doDeinit() {
+  if(!isThisMainThread()) {
+    // TODO Critical error!!!
+    return;
+  }
+
+  // First set running = false so the worker threads quit
+  gl_lock_lock(runLock);
+  gl_lock_lock(workLock);
+
+  running = false;
+  gl_cond_signal(workCond);
+
+  gl_lock_unlock(workLock);
+  gl_lock_unlock(runLock);
+
+  // We don't have to lock threadLock as detach() won't change workerThread when running is false
+  gl_thread_join(workerThread, 0);
+
+  // Now wait for all detached threads
+  gl_lock_lock(threadLock);
+  while(!threads.empty()) {
+    gl_thread_t thread = *threads.begin();
+    gl_lock_unlock(threadLock);
+
+    gl_thread_join(thread, 0);
+
+    gl_lock_lock(threadLock);
+    threads.erase(thread);
+  }
+  gl_lock_unlock(threadLock);
+
+  // Finally, the logger thread has to die
+  Common::LogManager::get()->stopLoggerThread();
+  gl_thread_join(loggerThread, 0);
+
+  // And then we clean everything up
+  Net::FdManager::get()->unregisterFd(ioNotifyPipe[0]);
+
+  close(ioNotifyPipe[0]);
+  close(ioNotifyPipe[1]);
+
+  gl_lock_destroy(ioLock);
+
+  gl_cond_destroy(workCond);
+  gl_lock_destroy(workLock);
+
+  gl_lock_destroy(runLock);
+  gl_lock_destroy(threadLock);
+}
+
+}
+}
-- 
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